An adjustable multi-band planar antenna especially applicable in mobile terminals and a radio device. The adjusting circuit (430) of the antenna is galvanically connected to a point (X) of the radiator, where the circuit can affect the places of at least two operating bands. The adjusting circuit comprises a multi-pole switch (433), by which said radiator point can be connected to one of alternative transmission lines. For example, one of two transmission lines (434, 435) is open and another shorted. A discrete capacitor (C2) can be located between the separate conductor of the transmission line and an output pole of the switch as an additive-tuning element. The adjusting circuit further comprises a lc circuit (432) between the radiator (320) and the switch. Among other things, the lengths of the transmission lines, the values of the discrete components and the distance between the antenna short-circuit point (G) and the adjusting circuit connecting point (X) are then variables from the point of view of the antenna adjusting. Such values are calculated for these variables that each of the antenna operation bands separately shifts to a desired other place when the switch state is changed. The space required for the adjusting circuit is relatively small, and a relatively high efficiency is achieved for the antenna despite of the use of a switch.

Patent
   8564485
Priority
Jul 25 2005
Filed
Jul 13 2006
Issued
Oct 22 2013
Expiry
Nov 29 2028
Extension
870 days
Assg.orig
Entity
Large
82
582
EXPIRED

REINSTATED
1. An adjustable antenna having at least a lower and an upper operating band and comprising:
a ground plane;
a radiating plane; and
an adjusting circuit configured to displace at least one of said lower and upper operating bands, said adjusting circuit comprising:
an lc circuit with an input coupled to the radiating plane;
a switch with its fixed end coupled to an output of the lc circuit; and
at least two tuning lines, the first of which is coupled to a first output pole of the switch and the second of said tuning lines coupled to a second output pole of the switch.
34. A radio device, comprising:
a radio transceiver circuit; and
an adjustable multiband antenna having at least a lower and an upper operating band, said antenna comprising:
a ground plane;
a radiating plane; and
an adjusting circuit configured to displace at least one of said lower and upper operating bands;
wherein said adjusting circuit comprises:
an inductive-capacitive (lc) circuit with an input coupled to the radiating plane;
a switch with its fixed end coupled to an output of the lc circuit; and
at least two tuning lines, the first of which is coupled to a first output pole of the switch and the second of said tuning lines coupled to a second output pole of the switch.
12. An adjustable antenna having at least a lower and an upper operating band and comprising:
a ground plane;
a radiating plane; and
an adjusting circuit to displace at least one operating band of the antenna;
wherein said radiating plane comprises a feeding point, a grounding point, an adjusting point of the antenna and two radiating parts having different electric lengths so as to implement said lower and upper operating bands;
wherein said adjusting circuit comprises an lc circuit with its input galvanically coupled to the radiating plane at said adjusting point, a switch with its common pole connected to an output of the lc circuit, and at least two tuning lines; and
wherein the electric distance in the radiating plane between the grounding point and the adjusting point is arranged for desired displacements of the operating bands, and the length of said tuning lines is at the most a fifth of the wavelength corresponding to the highest utilization frequency of the antenna.
23. An adjustable antenna, comprising:
at least a lower and an upper operating band;
a ground plane;
a radiating plane; and
an adjusting circuit to displace at least one operating band of the antenna, said radiating plane comprising a feeding point, a grounding point, an adjusting point of the antenna and two radiating parts having different electric length to implement said lower and upper operating bands;
wherein said adjusting circuit comprises an lc circuit with its input coupled to the radiating plane at said adjusting point, a switch with its common pole electrically coupled to the output of the lc circuit, and at least two tuning lines, the first of which is coupled at its head end to a first output pole of the switch and the second of which tuning lines is coupled at its head end to a second output pole of the switch to arrange alternative impedances between the adjusting point and ground and thus to displace the operating bands of the antenna; and
wherein the electric distance in the radiating plane between the grounding point and the adjusting point is arranged for desired displacements of the operating bands, and the length of said tuning lines is at the most a fifth of the wavelength corresponding to the highest utilization frequency of the antenna.
2. The antenna of claim 1, wherein an electric distance in the radiating plane between a grounding point and an adjusting point is arranged for desired displacements of the operating bands.
3. The antenna of claim 1, wherein the length of said tuning lines is at the most a fifth of the wavelength corresponding to the highest utilization frequency of the antenna.
4. The antenna of claim 1, wherein the first tuning line of the adjusting circuit is open at its tail end and the second tuning line is short-circuited at its tail end, and the adjusting circuit further comprises a capacitor connected between the second output pole of the switch and a separate conductor of the second tuning line.
5. The antenna of claim 4, wherein the radiating plane is coupled to the second tuning line, the adjusting circuit corresponds to a short-circuited transmission line with a quarter wavelength in the upper operating band, and the capacitance of the capacitor is arranged so that the adjusting circuit corresponds to a short-circuited transmission line with a zero length in the lower operating band, and when the radiating plane is connected to the first tuning line, the adjusting circuit corresponds to an open transmission line with a quarter wavelength in the upper operating band and the inductance of a coil of the lc circuit is arranged so that the adjusting circuit corresponds to an open transmission line with a zero length in the lower operating band.
6. The antenna of claim 1, wherein the first tuning line of the adjusting circuit is open at its tail end and the second tuning line is terminated by another coil at its tail end to keep the upper operating band in its place when the state of the switch changes.
7. The antenna of claim 1, wherein the length of the tuning lines is less than a twentieth of the wavelength corresponding to the highest utilization frequency of the antenna.
8. The antenna of claim 1, wherein the number of the output poles of the switch is at least three to increase the number of alternative places of at least one operating band.
9. The antenna of claim 1, wherein said lc circuit comprises an ESD protector of the switch.
10. The antenna of claim 1, wherein said lc circuit comprises a low-pass filter, said low-pass filter configured to limit the effect of a change in the switch state to the lower operating band.
11. The antenna of claim 1, wherein said lc circuit comprises a high-pass filter, said high-pass filter configured to limit the effect of a change in the switch state to the upper operating band.
13. The antenna of claim 12, wherein the first of said tuning lines is coupled at its head end to a first output pole of the switch, and the second of said tuning lines is coupled at its head end to a second output pole of the switch to arrange alternative impedances between the adjusting point and ground, thus displacing the operating bands of the antenna; and
wherein the first tuning line of the adjusting circuit is open at its tail end and the second tuning line is short-circuited at its tail end, and the adjusting circuit further comprises a capacitor connected between the second output pole of the switch and a separate conductor of the second tuning line.
14. The antenna of claim 13, wherein the radiating plane is connected to the second tuning line, the adjusting circuit corresponds to a short-circuited transmission line with a quarter wavelength in the upper operating band, and the capacitance of the capacitor is arranged so that the adjusting circuit corresponds to a short-circuited transmission line with a zero length in the lower operating band, and when the radiating plane is connected to the first tuning line, the adjusting circuit corresponds to an open transmission line with a quarter wavelength in the upper operating band and the inductance of a coil of the lc circuit is arranged so that the adjusting circuit corresponds to an open transmission line with a zero length in the lower operating band.
15. The antenna of claim 12, wherein the first tuning line of the adjusting circuit is open at its tail end and the second tuning line is terminated by another coil at its tail end to keep the upper operating band in its place when the state of the switch changes.
16. The antenna of claim 12, wherein the radiating plane comprises a shaping to arrange said electric distance between the grounding point and the adjusting point.
17. The antenna of claim 12, wherein the length of the tuning lines is less than a twentieth of the wavelength corresponding to the highest utilization frequency of the antenna.
18. The antenna of claim 12, wherein the number of the output poles of the switch is at least three to increase the number of alternative places of at least one operating band.
19. The antenna of claim 12, wherein said lc circuit comprises an ESD protector of the switch.
20. The antenna of claim 12, wherein said lc circuit comprises a low-pass filter to limit the effect of a changing of the switch state to the lower operating band.
21. The antenna of claim 12, wherein said lc circuit comprises a high-pass filter to limit the effect of a changing of the switch state to the upper operating band.
22. The antenna of claim 12, wherein said switch is selected from the group consisting of: the (i) FET, (ii) PHEMT or (iii) MEMS types.
24. An antenna according to claim 23, wherein the first tuning line of the adjusting circuit is open at its tail end and the second tuning line is short-circuited at its tail end, and the adjusting circuit further comprises a capacitor connected between the second output pole of the switch and a separate conductor of the second tuning line.
25. An antenna according to claim 24, characterized in that when the radiating plane is connected to the second tuning line, the adjusting circuit corresponds to a short-circuited transmission line with a quarter wavelength in the upper operating band, and the capacitance of the capacitor is arranged so that the adjusting circuit corresponds to a short-circuited transmission line with a zero length in the lower operating band, and when the radiating plane is connected to the first tuning line, the adjusting circuit corresponds to an open transmission line with a quarter wavelength in the upper operating band and the inductance of a coil of the lc circuit is arranged so that the adjusting circuit corresponds to an open transmission line with a zero length in the lower operating band.
26. An antenna according to claim 23, wherein the first tuning line of the adjusting circuit is open at its tail end and the second tuning line is terminated by another coil at its tail end to keep the upper operating band in its place when the state of the switch changes.
27. An antenna according to claim 23, wherein the radiating plane comprises a shaping to arrange said electric distance between the grounding point and the adjusting point.
28. An antenna according to claim 23, wherein the length of the tuning lines is less than a twentieth of the wavelength corresponding to the highest utilization frequency of the antenna.
29. An antenna according to claim 23, wherein the number of the output poles of the switch is at least three to increase the number of alternative places of at least one operating band.
30. An antenna according to claim 23, wherein said lc circuit comprises an ESD protection device for the switch.
31. An antenna according to claim 23, wherein said lc circuit comprises a low-pass filter adapted to limit the effect of a changing of the switch state to the lower operating band.
32. An antenna according to claim 23, wherein said lc circuit comprises a high-pass filter to limit the effect of a changing of the switch state to the upper operating band.
33. An antenna according to claim 23, wherein said switch is selected from the group consisting of: (i) FET, (ii) PHEMT, or (iii) MEMS type.
35. The radio device of claim 34, wherein the first tuning line of the adjusting circuit is open at a tail end thereof and the second tuning line is terminated by another coil at a tail end thereof to keep the upper operating band substantially fixed when a state of the switch changes.
36. The radio device of claim 34, wherein the length of the tuning lines is less than one-twentieth of a wavelength corresponding to a highest utilization frequency of the antenna.
37. The radio device of claim 34, wherein a number of output poles of the switch is at least three to increase a number of alternative places of at least one operating band.
38. The radio device of claim 34, wherein the lc circuit comprises an electrostatic discharge (ESD) protection device for the switch.
39. The radio device of claim 34, wherein said lc circuit comprises a low-pass filter configured to limit an effect of a changing of the switch state to the lower operating band.

This application claims priority to International PCT Application No. PCT/FI2006/050341 having an international filing date of Jul. 13, 2006, which claims priority to Finland Patent Application No. 20055420 filed Jul. 25, 2005, each of the foregoing incorporated herein by reference in its entirety.

A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever.

The invention relates to an adjustable multiband antenna especially applicable in mobile terminals. The invention further relates to a radio device equipped with such an antenna.

The adjustability of an antenna means in this description, that a resonance frequency or frequencies of the antenna can be changed electrically. The aim is that the operating band of the antenna around a resonance frequency always covers the frequency range, which the function presumes at each time. There are different causes for the need for adjustability. As portable radio devices, like mobile terminals, are becoming smaller thickness-wise, too, the distance between the radiating plane and the ground plane of an internal planar antenna unavoidably becomes shorter. This results in e.g. that the antenna bandwidths will decrease. Then, as a mobile terminal is intended for operating in a plurality of radio systems having frequency ranges relatively close to each other, it becomes more difficult or impossible to cover frequency ranges used by more than one radio system. Such a system pair is for instance GSM1800 and GSM1900 (Global System for Mobile telecommunications). Correspondingly, securing the function that conforms to specifications in both transmitting and receiving bands of a single system can become more difficult. If the system uses sub-band division, it is advantageous if the resonance frequency of the antenna can be tuned in a sub-band being used at each time, from the point of view of the radio connection quality.

In the invention described here the antenna adjusting is implemented by a switch. The use of switches for the purpose in question is well known as such. For example the publication EP1113 524 discloses an antenna, where a planar radiator can at a certain point be connected to the ground by a switch. When the switch is closed, the electric length of the radiator is decreased, in which case the antenna resonance frequency becomes higher and the operating band corresponding to the resonance frequency is displaced upwards. A capacitor can be in series with the switch to set the band displacement as large as desired. The solution is suitable for single-band antennas. The controlled displacement of the operating bands of a multi-band antenna is impossible.

In FIG. 1 there is a solution including a switch, known from the publication EP 04008490.7. Of the antenna base structure, only a part of the radiating plane 120 is drawn in the figure. The antenna has two separate operating bands. The antenna comprises, in addition to the base structure, an adjusting circuit having a parasitic element 131, a filter 132, a two-way switch 133, a terminating element 138 and transmission lines. The parasitic element has a significant electromagnetic coupling to the radiating plane and is connected through a short transmission line to the input port of the filter 132. Each transmission line comprises a ground conductor and a separate conductor. The output port of the filter is connected through the second short transmission line to the switch 133, the “hot” pole of the output port to the common pole of the switch by the separate conductor of the second transmission line. The common pole of the switch can be connected either to the second or the third pole of the switch by controlling the switch. The second pole of the switch is connected fixedly to the separate conductor 134 of the third short transmission line, which line is open at its opposite end. The third pole of the switch is connected fixedly to the separate conductor 135 of the fourth short transmission line. At the opposite end of the fourth transmission line there is a reactive terminating element 138. Its reactance X can be just a short-circuit (zero inductance). The impedance, which the adjusting circuit presents seen from the radiator, depends on the lengths of the transmission lines and the reactance X. The circuit can be designed so that the impedance of the adjusting circuit is very high when the common pole of the switch is connected to the third pole, and the impedance is suitable when the common pole is connected to the second pole. “Suitable” means a value, which causes the operating band to displace as much as desired when the state of the switch is changed.

The object of the filter 132 is to strict the effect of the switching only to one operating band. If it is desired that the effect is stricted e.g. to the upper operating band, the filter is made to be of high-pass type, and its cut-off frequency is arranged between the antenna operating bands. In this case the lower operating band is located in the stop band of the filter, and the impedance of the adjusting circuit at the frequencies of the lower operating band is high in both states of the switch. Changing the switch state then causes neither a change in the electric length of the antenna nor a displacement of the lower operating band.

In the solution according to FIG. 1 it is possible to affect a single operating band of a multi-band antenna without changing the place of the parasitic element used as a coupling element. However, the control of simultaneous displacements of two bands is impossible. In addition, it is difficult to keep the tolerances of the couplings between the paratisitic element and the radiators small enough in the production.

In FIG. 2 there is a solution including switches, known from the publication U.S. Pat. No. 6,650,295. The radiating plane 220 of a planar antenna is seen in the drawing. The radiating plane is located above the circuit board of a radio device, the conductive upper surface of the circuit board functioning as a ground plane 210 of the antenna and as a ground conductor of the transmission lines, which belong to the structure. The short-circuit conductor 211 and the feed conductor 212 of the antenna join to the radiating plane. Thus the antenna is of the PIFA type (Planar Inverted F-Antenna). In the radiating plane there is a non-conductive slot 225 starting from its edge, which slot divides the plane, as viewed from its short-circuit point, to two branches having different lengths. The PIFA is then a dual-band antenna. The lower operating band is based on the longer branch 221 and the upper operating band on the shorter branch 222.

Both the lower and upper operation band can be displaced in the structure according to FIG. 2. For the displacement of the lower operation band there is the first adjusting circuit 230 and for the displacement of the upper operation band the second adjusting circuit 240. The first adjusting circuit 230 comprises a first transmission line, a first switch 232 and two extension lines. The first transmission line is longer than the extension lines. The separate conductor 231 of the first transmission line joins the edge of the radiating plane at a point of its longer branch 221. The second end of the separate conductor 231 is connected to the common pole of the first switch 232. This switch has three states. In its first state the second end of the separate conductor 231 is switched to nothing, in the second state it is switched to the separate conductor 233 of the first extension line, and in the third state it is switched to the separate conductor 234 of the second extension line. Each extension line is shorted at its opposite end. They have different lengths, the longer branch of the radiating plane thus having three alternative electric lengths depending on the state of the switch 232, and correspondingly the lower operating band of the antenna having three alternative places. The second adjusting circuit 240 is similar to the first adjusting circuit. The separate conductor 241 of the fourth extension line, corresponding to the separate conductor 231 of the first transmission line, joins the edge of the radiating plane at such a point that the second adjusting circuit mainly affects solely the upper operating band. The place of the upper operating band can be selected from three alternatives by means of the second switch 242.

The lengths of the first and fourth transmission line are in the order of the quarter wave. If that length is shorter than the quarter wave, connecting a short extension line to its end results in that the band is displaced upwards, and if the length is longer than the quarter wave, connecting a short extension line to its end results in that the band is displaced downwards. The losses caused by the switch and thus the influence of the switch on the antenna efficiency depend on the length of the transmission line joining the radiating plane. That length and the lengths of the extension lines can be optimized so that the desired band displacements will be obtained at the cost of relatively small lowering of the antenna efficiency. The adjusting circuits further may comprise discrete tuning capacitors as an addition or replacing some transmission lines.

In the solution described above, the controlled displacement of two bands requires two adjusting circuits with their switches. This means a relatively complicated structure and high production costs.

In a first aspect of the invention, an adjusting circuit of an antenna, which has at least two operating bands is disclosed. In one embodiment, the adjusting circuit of an antenna is galvanically connected to a point of the radiator, where the circuit can affect the places of two antenna operating bands. The adjusting circuit comprises a multi-pole switch, by which said radiator point can be connected to one of alternative transmission lines. For example, one of the two transmission lines is open and another shorted. A discrete capacitor can be located between the separate conductor of the transmission line and an output pole of the switch as an additive tuning element. The adjusting circuit further comprises an LC circuit between the radiator and the switch. Among other things, the lengths of the transmission lines, the values of the discrete components and the distance between the antenna short-circuit point and the adjusting circuit connecting point then are variables from the point of view of the antenna adjusting. Such values are calculated for these variables that each of the two antenna operation bands separately shifts to a desired other place, when the switch state is changed.

An advantage of the invention is that desired displacements for the two antenna operation bands are obtained. One of the displacements can be set as zero, too. Another advantage of the invention is that these displacements can be implemented by a relatively simple adjusting circuit, which is connected to the radiator only at one point. A further advantage of the invention is that the space required for the antenna adjusting circuit is relatively small. This is due to that physically very short transmission lines are enough in the adjusting circuit according to the invention. A further advantage of the invention is that a relatively high efficiency is achieved for the antenna despite the use of a switch. A further advantage of the invention is that said LC circuit functions as an ESD protector (electro-static discharge) for the switch at the same time.

In an alternative, embodiment, the adjustable antenna comprises at least a lower and an upper operating band comprises a ground plane; a radiating plane; and an adjusting circuit for displacing at least one of said lower and upper operating bands. The adjusting circuit comprises an LC circuit with an input coupled to the radiating plane, a switch with its fixed end coupled to an output of the LC circuit and at least two tuning lines, the first of which is coupled to a first output pole of the switch and the second of said tuning lines coupled to a second output pole of the switch.

In one variant, the electric distance in the radiating plane between a grounding point and an adjusting point is arranged for desired displacements of the operating bands.

In another variant, the length of the tuning lines is at the most a fifth of the wavelength corresponding to the highest utilization frequency of the antenna.

In yet another variant, the first tuning line of the adjusting circuit is open at its tail end and the second tuning line is short-circuited at its tail end, and the adjusting circuit further comprises a capacitor connected between the second output pole of the switch and a separate conductor of the second tuning line.

In yet another variant, the radiating plane is coupled to the second tuning line, the adjusting circuit corresponds to a short-circuited transmission line with a quarter wavelength in the upper operating band, and the capacitance of the capacitor is arranged so that the adjusting circuit corresponds to a short-circuited transmission line with a zero length in the lower operating band, and when the radiator is connected to the first tuning line, the adjusting circuit corresponds to an open transmission line with a quarter wavelength in the upper operating band and the inductance of a coil of the LC circuit is arranged so that the adjusting circuit corresponds to an open transmission line with a zero length in the lower operating band.

In yet another variant, the first tuning line of the adjusting circuit is open at its tail end and the second tuning line is terminated by another coil at its tail end to keep the upper operating band in its place when the state of the switch changes.

In yet another variant the length of the tuning lines is less than a twentieth of the wavelength corresponding to the highest utilization frequency of the antenna.

In yet another variant, the number of the output poles of the switch is at least three to increase the number of alternative places of at least one operating band.

In yet another variant, the LC circuit comprises an ESD protector of the switch.

In yet another variant, the LC circuit is a low-pass filter limiting the effect of changing the switch state to the lower operating band.

In yet another variant, the LC circuit is a high-pass filter limiting the effect of changing the switch state to the upper operating band.

In a second aspect of the invention, a method of operating a multi-band adjustable antenna is disclosed. In one embodiment, the multi-band adjustable antenna comprises at least two operating bands and an adjusting circuit with the adjusting circuit comprising a switch, and the method comprises operating the multi-band adjustable antenna in a first state having at least first and second operating bands; switching the state of the switch; and operating the multi-band adjustable antenna in a second state having at least third and fourth operating bands.

In one variant, at least one of the operating bands comprises the GSM900 operating band.

In yet another variant, at least one of the one of the operating bands comprises the GSM1800 operating band.

In yet another variant, at least one of the operating bands comprises the GSM850 operating band.

In yet another variant, at least one of the operating bands comprises the GSM1900 operating band.

In a third aspect of the invention, apparatus incorporating the aforementioned antenna apparatus are disclosed. In one embodiment, the apparatus comprises a radio device, comprising: a radio transceiver circuit; and an adjustable multiband antenna having at least a lower and an upper operating band, said antenna comprising: a ground plane; a radiating plane; and an adjusting circuit for displacing at least one of said lower and upper operating bands.

In one variant, the adjusting circuit comprises: an LC circuit with an input coupled to the radiating plane; a switch with its fixed end coupled to an output of the LC circuit; and at least two tuning lines, the first of which is coupled to a first output pole of the switch and the second of said tuning lines coupled to a second output pole of the switch.

FIG. 1 presents an example of an adjustable antenna according to the prior art,

FIG. 2 presents an second example of an adjustable antenna according to the prior art,

FIG. 3 presents an example of the radiating plane of an adjustable antenna according to the invention,

FIG. 4 presents an example of the adjusting circuit of an antenna according to the invention,

FIG. 5 presents an example of the displacement of operation bands of an antenna according to the invention,

FIG. 6 presents changes in the impedance of the antenna adjusting circuit in the exemplary case of FIG. 5,

FIG. 7 presents the antenna efficiency in the exemplary case of FIG. 5,

FIG. 8 presents another example of the adjusting circuit of an antenna according to the invention,

FIG. 9 presents another example of an antenna according to the invention, and

FIG. 10 presents an example of a radio device equipped with an antenna according to the invention.

FIGS. 1 and 2 were already described in conjunction with the description of the prior art.

FIG. 3 shows an example of an antenna according to the invention as seen from above, or from the side of the radiating plane. The circuit board PCB of a radio device is seen below the radiating plane 320, the conductive upper surface of the circuit board functioning as a ground plane 310 of the antenna. The antenna short-circuit conductor joins the radiating plane at the short-circuit point, or the grounding point G, and the feed conductor joins the radiating plane at the feeding point F. In addition, a conductor of the antenna adjusting circuit joins the radiating plane at the adjusting point X. In this example the radiating plane is rectangular by outline, and all three points are located at its same long side, the feeding point being located closest to a corner and the grounding point being located therebetween. The radiating plane is shaped so that the antenna of the example is a dual-band antenna; it has a lower and an upper operating band. The lower operating band is based on the PIFA structure formed by the radiating plane, the ground plane and the feed and short-circuit conductors. The upper operating band is based on the slot radiator, which slot 322 starts at the edge of the radiating plane, beside the adjusting point X, on the farther side of the point X as seen from the grounding point G. The slot 322 ends in the inner area of the radiating plane near the opposite end of the plane as seen from the feeding point. The slot naturally affects the electric length of the lower operating band radiator 320 at the same time. In the radiating plane there is also an L-shaped slot starting between the feeding and short-circuit points, by which slot the antenna matching is improved both in the lower and the upper operating bands. In addition, the radiating plane has in this example two projections being directed towards the ground plane to tune the antenna and to improve its matching. One projection 328 is located at the end on the side of the feeding point, and the other projection 329 is located at the side of the grounding and adjusting points, from the open end of the slot radiator 322 towards the opposite end of the plane.

Based on the location of the adjusting point X, a circuit connected to it affects both the lower and the upper operating band. If the adjusting point were connected directly to the ground plane, for example, the electric length of the antenna parts corresponding to both the lower and the upper operating band would decrease, in which case both bands would shift upwards. The adjusting circuit connected to the adjusting point is located either below the radiating plane 320 or on the opposite side of the circuit board PCB.

The electric distance between the grounding point G and the adjusting point X has a significant effect on how big the band displacements are when the adjusting circuit is controlled. In an antenna according to the invention, said distance is one variable in addition to the variables of the adjusting circuit when a desired result is seeked. An arrangement is included in the radiating plane for setting said distance. At the simplest, this arrangement means only that the direct distance between the points G and X is chosen to be suitable. In the example of FIG. 3 the arrangement comprises a notch 326 being located in the portion of the radiating plane between those points.

FIG. 4 shows an example of the adjusting circuit of an antenna according to the invention. The adjusting circuit 430 is galvanically connected to the antenna radiator at the adjusting point X. The adjusting circuit comprises, in order from the radiator, an input line 431 of the adjusting circuit, an LC circuit 432, a switch 433 and the tuning lines 434, 435. Each transmission line comprises a ground conductor and a conductor isolated from the ground, which conductor is also here called a separate conductor. The LC circuit 432 is on one hand for the ESD protection of the switch and on the other hand for increasing the number of the variable parameters of the adjusting circuit. It is formed of a coil L and a capacitor C1. The coil has been connected transversely to the input line 431, that is between its separate conductor and the ground. The capacitor C1 is in series with the separate conductor of the input line, and the second terminal of the capacitor is connected to the common pole of the switch 433. The switch is a two-way switch, where the common pole can be connected to one of two other poles. These other poles are called output poles of the switch. The first output pole of the switch is connected to the head end of the separate conductor of the first tuning line 434, and the second output pole is connected, through the capacitor C2, to the head end of the separate conductor of the second tuning line 435. Thus the input line of the adjusting circuit can continue, after the LC circuit and the switch, either as the first tuning line or as the second tuning line. When the switch state is changed, the reactive impedance, which is “seen” from the adjusting point X of the radiating plane to the ground, changes. In that case the resonance frequencies of the antenna parts change and the operating bands therefore shift.

In this example the first tuning line 434 is open at its tail end, and the second tuning line 435 is short-circuited at its tail end. The tuning lines are short, usually shorter than the quarter wavelength. In that case the open line represents a certain capacitance, and the short-circuited line represents a certain inductance. As known, the values of the capacitance and the inductance depend on the frequency: At the frequencies of the upper operating band they are higher than at the frequencies of the lower operating band, if the line is shorter than the quarter wavelength also in the upper band. The frequency-dependency of the capacitance in the discrete capacitor is just negligible. So the lengths of the tuning lines are used as variables in this invention when the adjusting circuit is designed. Among other things, the values of the discrete components of the adjusting circuit, the length of the input line 431 and the electric distance between the grounding point G and the adjusting point X in the radiating plane, mentioned in the description of FIG. 3, are other variables, or variable parameters Naturally, the starting point is the dimensioning of the antenna basic structure for part of the radiating plane. The number of the variables is high considering the simplicity of the adjusting circuit, and some variables have different frequency characteristics than some others. These facts make it possible to design the antenna with its adjusting circuit so that the displacements having desired directions and extents can be obtained for the lower and upper operating bands independently from each other. For example, if one band has to remain in its place, its displacement can be arranged as zero.

The capacitor C2 functions also as a blocking capacitor preventing the forming of a direct current circuit through the short-circuited tuning line as seen from the control circuit of the switch. On the side of the open tuning line, no blocking capacitor is needed, of course, but also there could be a discrete component for the tuning purpose.

The number of the switch operating states and of the tuning lines or circuits corresponding to those states can naturally be also more than two to implement several alternative places for an operating band. On the other hand, more than two operating bands may be implemented by the radiating plane, in which case the displacements of them all can be controlled by one adjusting circuit to some extent.

FIG. 5 shows an example of the displacement of operation bands of an antenna according to the invention. The example relates to the antenna according to FIG. 3 comprising an adjusting circuit according to FIG. 4. The object has been that in one switch state the antenna's lower operating band would cover the frequency range 890-960 MHz of the GSM900 system and the upper operating band would cover the frequency range 1710-1880 MHz of the GSM1800 system, and that in the other switch state the lower operating band would cover the frequency range 824-894 MHz of the GSM850 system and the upper operating band would cover the frequency range 1850-1990 MHz of the GSM1900 system. Curve 51 shows fluctuation of the reflection coefficient as a function of frequency, when the radiator is connected to the short-circuited, very short tuning line. Curve 52 shows fluctuation of the reflection coefficient, when the radiator is connected to the tuning line, which is open at its tail end. From the curves can be seen that the above-mentioned object is fulfilled for part of the lower operating band, if the value −5 dB is considered as a criterion for the usable reflection coefficient. The object is fulfilled also for the upper operating band except for its uppermost part, where the antenna matching is only passable.

In the example of FIG. 5 the antenna adjusting circuit has been designed as follows: L=5.6 nH, C1=8.2 pF and C2=100 pF. The first tuning line 434 is a 3 mm long planar line on the surface of circuit board material FR-4. The length of the second tuning line as well as the length of the input line 431 of the adjusting circuit is practically zero. In that case, when the radiator is connected to the short-circuited tuning line, the whole adjusting circuit is “seen” from the radiator as a very short short-circuited transmission line at the frequencies of the lower operating band. This means a low impedance. Without the capacitor C2 the adjusting circuit would represent a short-circuited transmission line with about a ⅛ wavelength, but a value has been searched for the capacitance C2, which shortens the electric length of the transmission line to zero. At the frequencies of the upper operating band the capacitance C2 has only a minor effect. Because the upper operating band is located at about double frequencies compared with the lower band, the adjusting circuit is “seen” from the radiator as a short-circuited transmission line with about a quarter wavelength at the frequencies of the upper operating band. This means a high impedance. On the other hand, the adjusting circuit is designed so that when the radiator is connected to the open tuning line, the whole adjusting circuit is “seen” from the radiator as a very short open transmission line at the frequencies of the lower operating band. This means a high impedance. Without the coil L the adjusting circuit would represent an open transmission line with about a ⅛ wavelength, but a value has been searched for the inductance L, which shortens the electric length of the transmission line to zero. At the frequencies of the upper operating band the inductance L has only a minor effect. For this reason the adjusting circuit is “seen” from the radiator as an open transmission line with about a quarter wavelength at the frequencies of the upper operating band. This means a low impedance. These facts explain the directions of the displacements of the operating bands.

Another alternative would be to design the adjusting circuit so that when the radiator is connected to the open tuning line, the whole adjusting circuit would be “seen” as an open transmission line with about a quarter wavelength at the frequencies of the lower operating band, and correspondingly as an open transmission line with about a half wavelength at the frequencies of the upper operating band. On the other hand, when the radiator is connected to the short-circuited tuning line, the whole adjusting circuit would be “seen” as a short-circuited transmission line with about a quarter wavelength at the frequencies of the lower operating band, and correspondingly as a short-circuited transmission line with about a half wavelength at the frequencies of the upper operating band. Also in this case the impedance of the adjusting circuit would change from low to high in the lower operating band and from high to low in the upper operating band, when the switch state is changed. This again results in that the lower operating band shifts down-wards and the upper operating band shifts upwards, as in the previous case corresponding to the exemplary design. Using discrete components according to the invention, the physical lengths of the transmission lines needed are considerably shorter, for which reason the adjusting circuit fits into a smaller space.

FIG. 6 shows as a Smith diagram an example of changes in the impedance of the adjusting circuit of an antenna according to the invention. The example relates to the same structure as the matching curves in FIG. 5. Curve 61 shows fluctuation of the impedance as a function of frequency, when the radiator is connected to the short-circuited, very short tuning line, curve 62 shows fluctuation of the impedance, when the radiator is connected to the tuning line, which is open at its tail end. In a lossless case the curves would travel along the outer circle of the diagram. Now they travel only relatively close to the outer circle, which means losses of a certain level in the adjusting circuit. These losses are included in the efficiency curves of FIG. 7.

The left end of the curve 61 represents the band used by GSM900 system and the right end represents the band used by GSM1800 system. In the previous band the adjusting circuit impedance is intended to be low, in which case particularly the resistive part of the impedance should be low. The resistive part is indeed only about 5% of the antenna characteristics impedance. In the band used by GSM1800 system the adjusting circuit impedance is intended to be high. In this example it is inductive and has an absolute value, which is about five times the antenna characteristics impedance. The left end of the curve 62 represents the band used by GSM1900 system and the right end represents the band used by GSM850 system. In the previous band the adjusting circuit impedance is intended to be low, in which case particularly the resistive part of the impedance should be low. The resistive part is indeed less than 10% of the antenna characteristics impedance. In the band used by GSM850 system the adjusting circuit impedance is intended to be high. In this example it is inductive and has an absolute value, which is nearly three times the antenna characteristics impedance.

FIG. 7 shows an example of the efficiency of an antenna according to the invention. The example concerns the same structure as the matching curves in FIG. 5. Curve 71 shows the fluctuation of the efficiency as a function of frequency when the radiator is connected to the short-circuited, very short tuning line. Curve 72 shows fluctuation of the efficiency when the radiator is connected to the tuning line, which is open at its tail end. It can be seen from the curves that the efficiency is better than 0.4 in the lower operating bands and better than 0.5 in the upper operating bands except for the very uppermost parts.

FIG. 8 shows another example of the adjusting circuit of an antenna according to the invention. The adjusting circuit 830 is galvanically connected to the antenna radiator at the adjusting point X. The adjusting circuit comprises, in order from the radiator, an input line 831 of the adjusting circuit, an LC circuit 832, a switch 833 and the tuning lines 834, 835, as in the circuit of FIG. 4. Similarly, the first output pole of the switch is connected to the head end of the separate conductor of the first tuning line 834, and the second output pole has been connected, through the capacitor C2, to the head end of the separate conductor of the second tuning line 835. Also in this example the first tuning line 834 is open at its tail end. The differences in respect of the circuit of FIG. 4 are: The tuning lines are now of equal length, the second tuning line is now terminated by a coil L2, and the capacitor C2 functions only as a blocking capacitor.

The antenna proper and the adjusting circuit are designed so that when the radiator is connected to the open tuning line, the antenna's upper operating band covers e.g. the frequency range of the GSM1800 system and the lower operating band covers e.g. the frequency range of the GSM850 system. At the frequencies of the lower operating band the adjusting circuit impedance is arranged to be relatively high. The inductance of the coil L2 is chosen so that its reactance in the upper operating band is relatively high. For this reason the adjusting circuit impedance hardly changes at the frequencies of the upper operating band when the radiator is connected to the tuning line, which is terminated by the coil L2. In that case the upper operating band remains nearly in its place. Instead, at the frequencies of the lower operating band the adjusting circuit impedance becomes lower so that the lower operating band shifts upwards for example to the range used by the GSM900 system.

Another way to limit the effect of the switch to one operating band is to implement the LC circuit between the radiator and the switch as a filter, the cut-off frequency of which is located between the lower and upper operating bands of the antenna. When the object is to displace only the upper operating band, the filter is of high-pass type, and when the object is to displace only the lower operating band, the filter is of low-pass type. The order of the filter is naturally selectable. Also this kind of filter functions at the same time as an ESD protector for the switch. For this aim a high-pass part can be added to the low-pass filter so that a bandpass filter is formed.

FIG. 9 shows another example of an antenna according to the invention as seen from above, or from the side of the radiating plane. For its inventive part the antenna is similar to the antenna presented in FIG. 3. One difference is that the antenna in FIG. 9 further comprises a parasitic radiator 950. This is located beside the end of the radiating plane 920 on the side of the feeding point F, and is connected to the ground plane at the grounding point G2 next to the feeding point F. Changing the resonance frequencies of the main radiator hardly affects the resonance frequency of the parasitic element because of its location. The resonance frequency of the parasitic element can be arranged e.g. into the range of 2.2 GHz so that an operating band is obtained for the antenna in the frequency range used by the WCDMA system (Wideband Code Division Multiple Access).

The antenna in FIG. 9 lacks ground plane on a relatively large area 901 below the radiating plane. This feature has nothing to do with the above-mentioned parasitic radiator: An antenna according to the invention does not require a “solid” ground plane below the radiating plane. The ground plane can be located even considerably more aside from the radiating plane than in the example of FIG. 9.

FIG. 10 shows a radio device RD, which comprises an adjustable multiband antenna A00 according to the invention with its adjusting circuit A30.

The adjustable multiband antenna according to the invention has been described above. Its structure can naturally differ from that presented. The invention does not limit the manufacturing method of the antenna. The antenna can be e.g. ceramic, in which case the radiators are conductive coatings of the ceramics. The switch used in the adjusting circuit can be of e.g. the FET (Field Effect Transistor), PHEMT (Pseudomorphic High Electron Mobility Transistor) or MEMS (Micro Electro Mechanical System) type. It is possible to use a capacitance diode as the adjusting component, too. The inventive idea can be applied in different ways within the scope defined by the independent claim 1.

Braun, Christian, Leskelä, Antti, Milosavljevic, Zlatoljub

Patent Priority Assignee Title
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ER3794,
Patent Priority Assignee Title
2745102,
3938161, Oct 03 1974 Ball Brothers Research Corporation Microstrip antenna structure
4004228, Apr 29 1974 Integrated Electronics, Ltd. Portable transmitter
4028652, Sep 06 1974 Murata Manufacturing Co., Ltd. Dielectric resonator and microwave filter using the same
4031468, May 04 1976 Reach Electronics, Inc. Receiver mount
4054874, Jun 11 1975 Hughes Aircraft Company Microstrip-dipole antenna elements and arrays thereof
4069483, Nov 10 1976 The United States of America as represented by the Secretary of the Navy Coupled fed magnetic microstrip dipole antenna
4123756, Sep 24 1976 Nippon Electric Co., Ltd. Built-in miniature radio antenna
4123758, Feb 27 1976 Sumitomo Electric Industries, Ltd. Disc antenna
4131893, Apr 01 1977 Ball Corporation Microstrip radiator with folded resonant cavity
4201960, May 24 1978 Motorola, Inc. Method for automatically matching a radio frequency transmitter to an antenna
4255729, May 13 1978 Oki Electric Industry Co., Ltd. High frequency filter
4313121, Mar 13 1980 The United States of America as represented by the Secretary of the Army Compact monopole antenna with structured top load
4356492, Jan 26 1981 The United States of America as represented by the Secretary of the Navy Multi-band single-feed microstrip antenna system
4370657, Mar 09 1981 The United States of America as represented by the Secretary of the Navy Electrically end coupled parasitic microstrip antennas
4423396, Sep 30 1980 Matsushita Electric Industrial Company, Limited Bandpass filter for UHF band
4431977, Feb 16 1982 CTS Corporation Ceramic bandpass filter
4546357, Apr 11 1983 SINGER COMPANY THE 8 STAMFORD FORUM, A NJ CORP Furniture antenna system
4559508, Feb 10 1983 Murata Manufacturing Co., Ltd. Distribution constant filter with suppression of TE11 resonance mode
4625212, Mar 19 1983 NEC Corporation Double loop antenna for use in connection to a miniature radio receiver
4652889, Dec 13 1983 Thomson-CSF Plane periodic antenna
4661992, Jul 31 1985 Motorola Inc. Switchless external antenna connector for portable radios
4692726, Jul 25 1986 CTS Corporation Multiple resonator dielectric filter
4703291, Mar 13 1985 Murata Manufacturing Co., Ltd. Dielectric filter for use in a microwave integrated circuit
4706050, Sep 22 1984 Smiths Group PLC Microstrip devices
4716391, Jul 25 1986 CTS Corporation Multiple resonator component-mountable filter
4740765, Sep 30 1985 Murata Manufacturing Co., Ltd. Dielectric filter
4742562, Sep 27 1984 CTS Corporation Single-block dual-passband ceramic filter useable with a transceiver
4761624, Aug 08 1986 ALPS Electric Co., Ltd. Microwave band-pass filter
4800348, Aug 03 1987 CTS Corporation Adjustable electronic filter and method of tuning same
4800392, Jan 08 1987 MOTOROLA, INC , SCHAUMBURG, ILL A CORP OF DE Integral laminar antenna and radio housing
4821006, Jan 17 1987 Murata Manufacturing Co., Ltd. Dielectric resonator apparatus
4823098, Jun 14 1988 CTS Corporation Monolithic ceramic filter with bandstop function
4827266, Feb 26 1985 Mitsubishi Denki Kabushiki Kaisha Antenna with lumped reactive matching elements between radiator and groundplate
4829274, Jul 25 1986 CTS Corporation Multiple resonator dielectric filter
4862181, Oct 31 1986 Motorola, Inc. Miniature integral antenna-radio apparatus
4879533, Apr 01 1988 Motorola, Inc. Surface mount filter with integral transmission line connection
4896124, Oct 31 1988 MURRAY, INC Ceramic filter having integral phase shifting network
4954796, Jul 25 1986 CTS Corporation Multiple resonator dielectric filter
4965537, Jun 06 1988 CTS Corporation Tuneless monolithic ceramic filter manufactured by using an art-work mask process
4977383, Oct 27 1988 LK-Products Oy Resonator structure
4980694, Apr 14 1989 GoldStar Products Company, Limited; GOLDSTAR PRODUCTS COMPANY, LIMITED, A DE CORP Portable communication apparatus with folded-slot edge-congruent antenna
5017932, Nov 04 1988 Hitachi Kokusai Electric, Inc Miniature antenna
5047739, Nov 20 1987 Intel Corporation Transmission line resonator
5053786, Jan 28 1982 Litton Systems, Inc Broadband directional antenna
5097236, May 02 1989 MURATA MANUFACTURING CO , LTD Parallel connection multi-stage band-pass filter
5103197, Jun 01 1990 LK-Products Oy Ceramic band-pass filter
5109536, Oct 27 1989 CTS Corporation Single-block filter for antenna duplexing and antenna-summed diversity
5155493, Aug 28 1990 The United States of America as represented by the Secretary of the Air Tape type microstrip patch antenna
5157363, Feb 07 1990 LK Products Helical resonator filter with adjustable couplings
5159303, May 04 1990 LK-Products Temperature compensation in a helix resonator
5166697, Jan 28 1991 Lockheed Martin Corporation Complementary bowtie dipole-slot antenna
5170173, Apr 27 1992 QUARTERHILL INC ; WI-LAN INC Antenna coupling apparatus for cordless telephone
5203021, Oct 22 1990 Motorola Inc. Transportable support assembly for transceiver
5210510, Feb 07 1990 LK-Products Oy Tunable helical resonator
5210542, Jul 03 1991 Ball Aerospace & Technologies Corp Microstrip patch antenna structure
5220335, Mar 30 1990 The United States of America as represented by the Administrator of the Planar microstrip Yagi antenna array
5229777, Nov 04 1991 Microstrap antenna
5239279, Apr 12 1991 PULSE FINLAND OY Ceramic duplex filter
5278528, Apr 12 1991 LK-Products Oy Air insulated high frequency filter with resonating rods
5281326, Sep 19 1990 Filtronic LK Oy Method for coating a dielectric ceramic piece
5298873, Jun 25 1991 Filtronic LK Oy Adjustable resonator arrangement
5302924, Jun 25 1991 LK-Products Oy Temperature compensated dielectric filter
5304968, Oct 31 1991 Intel Corporation Temperature compensated resonator
5307036, Jun 09 1989 PULSE FINLAND OY Ceramic band-stop filter
5319328, Jun 25 1991 LK-Products Oy Dielectric filter
5349315, Jun 25 1991 LK-Products Oy Dielectric filter
5349700, Oct 28 1991 Bose Corporation Antenna tuning system for operation over a predetermined frequency range
5351023, Apr 21 1992 Filtronic LK Oy Helix resonator
5354463, Jun 25 1991 LK Products Oy Dielectric filter
5355142, Oct 15 1991 Ball Aerospace & Technologies Corp Microstrip antenna structure suitable for use in mobile radio communications and method for making same
5357262, Dec 10 1991 Auxiliary antenna connector
5363114, Jan 29 1990 ARC WIRELESS, INC Planar serpentine antennas
5369782, Aug 22 1990 Mitsubishi Denki Kabushiki Kaisha Radio relay system, including interference signal cancellation
5382959, Apr 05 1991 Ball Aerospace & Technologies Corp Broadband circular polarization antenna
5386214, Feb 14 1989 Fujitsu Limited Electronic circuit device
5387886, May 14 1992 Filtronic LK Oy Duplex filter operating as a change-over switch
5394162, Mar 18 1993 Ford Motor Company Low-loss RF coupler for testing a cellular telephone
5408206, May 08 1992 LK-Products Oy Resonator structure having a strip and groove serving as transmission line resonators
5418508, Nov 23 1992 Filtronic LK Oy Helix resonator filter
5432489, Mar 09 1992 Filtronic LK Oy Filter with strip lines
5438697, Apr 23 1992 Cobham Defense Electronic Systems Corporation Microstrip circuit assembly and components therefor
5440315, Jan 24 1994 Intermec IP Corporation Antenna apparatus for capacitively coupling an antenna ground plane to a moveable antenna
5442280, Sep 10 1992 Areva T&D SA Device for measuring an electrical current in a conductor using a Rogowski coil
5442366, Jul 13 1993 Ball Corporation Raised patch antenna
5444453, Feb 02 1993 Ball Aerospace & Technologies Corp Microstrip antenna structure having an air gap and method of constructing same
5467065, Mar 03 1993 LK-Products Oy Filter having resonators coupled by a saw filter and a duplex filter formed therefrom
5473295, Jul 06 1990 LK-Products Saw notch filter for improving stop-band attenuation of a duplex filter
5506554, Jul 02 1993 PULSE FINLAND OY Dielectric filter with inductive coupling electrodes formed on an adjacent insulating layer
5508668, Apr 08 1993 LK-PRODUCTS, OY Helix resonator filter with a coupling aperture extending from a side wall
5517683, Jan 18 1995 Cycomm Corporation Conformant compact portable cellular phone case system and connector
5521561, Feb 09 1994 Filtronic LK Oy Arrangement for separating transmission and reception
5532703, Apr 22 1993 CTI AUDIO, INC Antenna coupler for portable cellular telephones
5541560, Mar 03 1993 Filtronic LK Oy Selectable bandstop/bandpass filter with switches selecting the resonator coupling
5541617, Oct 21 1991 MAXRAD, INC Monolithic quadrifilar helix antenna
5543764, Mar 03 1993 LK-Products Oy Filter having an electromagnetically tunable transmission zero
5550519, Jan 18 1994 LK-Products Oy Dielectric resonator having a frequency tuning element extending into the resonator hole
5557287, Mar 06 1995 Motorola, Inc. Self-latching antenna field coupler
5557292, Jun 22 1994 SPACE SYSTEMS LORAL, LLC Multiple band folding antenna
5570071, May 04 1990 LK-Products Oy Supporting of a helix resonator
5585771, Dec 23 1993 LK-Products Oy Helical resonator filter including short circuit stub tuning
5585810, May 05 1994 Murata Manufacturing Co., Ltd. Antenna unit
5589844, Jun 06 1995 HYSKY TECHNOLOGIES, INC Automatic antenna tuner for low-cost mobile radio
5594395, Sep 10 1993 Filtronic LK Oy Diode tuned resonator filter
5604471, Mar 15 1994 Filtronic LK Oy Resonator device including U-shaped coupling support element
5627502, Jan 26 1994 Filtronic LK Oy Resonator filter with variable tuning
5649316, Mar 17 1995 Elden, Inc. In-vehicle antenna
5668561, Nov 13 1995 Motorola, Inc. Antenna coupler
5675301, May 26 1994 PULSE FINLAND OY Dielectric filter having resonators aligned to effect zeros of the frequency response
5689221, Oct 07 1994 Filtronic LK Oy Radio frequency filter comprising helix resonators
5694135, Dec 18 1995 QUARTERHILL INC ; WI-LAN INC Molded patch antenna having an embedded connector and method therefor
5703600, May 08 1996 QUARTERHILL INC ; WI-LAN INC Microstrip antenna with a parasitically coupled ground plane
5709832, Jun 02 1995 Ericsson Inc.; Ericsson Inc Method of manufacturing a printed antenna
5711014, Apr 05 1993 ANTENNATECH LLC Antenna transmission coupling arrangement
5717368, Sep 10 1993 Filtronic LK Oy Varactor tuned helical resonator for use with duplex filter
5731749, Apr 12 1996 Filtronic LK Oy Transmission line resonator filter with variable slot coupling and link coupling #10
5734305, Mar 22 1995 Filtronic LK Oy Stepwise switched filter
5734350, Apr 08 1996 LAIRDTECHNOLOGEIS, INC Microstrip wide band antenna
5734351, Jun 05 1995 PULSE FINLAND OY Double-action antenna
5739735, Mar 22 1995 Filtronic LK Oy Filter with improved stop/pass ratio
5742259, Apr 07 1995 PULSE FINLAND OY Resilient antenna structure and a method to manufacture it
5757327, Jul 29 1994 MITSUMI ELECTRIC CO , LTD Antenna unit for use in navigation system
5764190, Jul 15 1996 The Hong Kong University of Science & Technology Capacitively loaded PIFA
5767809, Mar 07 1996 Industrial Technology Research Institute OMNI-directional horizontally polarized Alford loop strip antenna
5768217, May 14 1996 Casio Computer Co., Ltd. Antennas and their making methods and electronic devices or timepieces with the antennas
5777581, Dec 07 1995 Titan Aerospace Electronics Division Tunable microstrip patch antennas
5777585, Apr 08 1995 Sony Corporation Antenna coupling apparatus, external-antenna connecting apparatus, and onboard external-antenna connecting apparatus
5793269, Aug 23 1995 Filtronic LK Oy Stepwise regulated filter having a multiple-step switch
5812094, Apr 02 1996 Qualcomm Incorporated Antenna coupler for a portable radiotelephone
5815048, Nov 23 1995 Filtronic LK Oy Switchable duplex filter
5822705, Sep 26 1995 Nokia Technologies Oy Apparatus for connecting a radiotelephone to an external antenna
5852421, Apr 02 1996 Qualcomm Incorporated Dual-band antenna coupler for a portable radiotelephone
5861854, Jun 19 1996 MURATA MANUFACTURING CO LTD Surface-mount antenna and a communication apparatus using the same
5874926, Mar 11 1996 MURATA MANUFACTURING CO , LTD Matching circuit and antenna apparatus
5880697, Sep 25 1996 IMPERIAL BANK Low-profile multi-band antenna
5886668, Mar 08 1994 TELIT COMMUNICATIONS S P A Hand-held transmitting and/or receiving apparatus
5892490, Nov 07 1996 Murata Manufacturing Co., Ltd. Meander line antenna
5903820, Apr 07 1995 Filtronic LK Oy Radio communications transceiver with integrated filter, antenna switch, directional coupler and active components
5905475, Apr 05 1995 Filtronic LK Oy Antenna, particularly a mobile phone antenna, and a method to manufacture the antenna
5920290, Jan 31 1995 FLEXcon Company Inc. Resonant tag labels and method of making the same
5926139, Jul 02 1997 THE CHASE MANHATTAN BANK, AS COLLATERAL AGENT Planar dual frequency band antenna
5929813, Jan 09 1998 RPX Corporation Antenna for mobile communications device
5936583, Sep 30 1992 Kabushiki Kaisha Toshiba Portable radio communication device with wide bandwidth and improved antenna radiation efficiency
5943016, Dec 07 1995 Titan Aerospace Electronics Division Tunable microstrip patch antenna and feed network therefor
5952975, Mar 08 1994 TELIT COMMUNICATIONS S P A Hand-held transmitting and/or receiving apparatus
5959583, Dec 27 1995 Qualcomm Incorporated Antenna adapter
5963180, Mar 29 1996 Sarantel Limited Antenna system for radio signals in at least two spaced-apart frequency bands
5966097, Jun 03 1996 Mitsubishi Denki Kabushiki Kaisha Antenna apparatus
5970393, Feb 25 1997 Intellectual Ventures Holding 19, LLC Integrated micro-strip antenna apparatus and a system utilizing the same for wireless communications for sensing and actuation purposes
5977710, Mar 11 1996 NEC Corporation Patch antenna and method for making the same
5986606, Aug 21 1996 HANGER SOLUTIONS, LLC Planar printed-circuit antenna with short-circuited superimposed elements
5986608, Apr 02 1998 WSOU Investments, LLC Antenna coupler for portable telephone
5990848, Feb 16 1996 Filtronic LK Oy Combined structure of a helical antenna and a dielectric plate
5999132, Oct 02 1996 Nortel Networks Limited Multi-resonant antenna
6005529, Dec 04 1996 DBSD SERVICES LIMITED Antenna assembly with relocatable antenna for mobile transceiver
6006419, Sep 01 1998 GOOGLE LLC Synthetic resin transreflector and method of making same
6008764, Mar 25 1997 WSOU Investments, LLC Broadband antenna realized with shorted microstrips
6009311, Feb 21 1996 Etymotic Research Method and apparatus for reducing audio interference from cellular telephone transmissions
6014106, Nov 14 1996 PULSE FINLAND OY Simple antenna structure
6016130, Aug 22 1996 Filtronic LK Oy Dual-frequency antenna
6023608, Apr 26 1996 Filtronic LK Oy Integrated filter construction
6031496, Aug 06 1996 Filtronic LK Oy Combination antenna
6034637, Dec 23 1997 Motorola, Inc. Double resonant wideband patch antenna and method of forming same
6034640, Apr 01 1997 MURATA MANUFACTURING CO LTD Antenna device
6037848, Sep 26 1996 Filtronic LK Oy Electrically regulated filter having a selectable stop band
6043780, Dec 27 1995 Qualcomm Incorporated Antenna adapter
6072434, Feb 04 1997 THE CHASE MANHATTAN BANK, AS COLLATERAL AGENT Aperture-coupled planar inverted-F antenna
6078231, Feb 07 1997 Filtronic Comtek OY High frequency filter with a dielectric board element to provide electromagnetic couplings
6091363, Mar 23 1995 Honda Giken Kogyo Kabushiki Kaisha Radar module and antenna device
6097345, Nov 03 1998 The Ohio State University Dual band antenna for vehicles
6100849, Nov 17 1998 Murata Manufacturing Co., Ltd. Surface mount antenna and communication apparatus using the same
6112106, Dec 29 1995 ANTENNATECH LLC Antenna transmission coupling arrangement
6133879, Dec 11 1997 WSOU Investments, LLC Multifrequency microstrip antenna and a device including said antenna
6134421, Sep 10 1997 QUALCOMM INCORPORATED A DELAWARE CORP RF coupler for wireless telephone cradle
6140973, Jan 24 1997 PULSE FINLAND OY Simple dual-frequency antenna
6147650, Feb 24 1998 Murata Manufacturing Co., Ltd. Antenna device and radio device comprising the same
6157819, May 14 1996 PULSE FINLAND OY Coupling element for realizing electromagnetic coupling and apparatus for coupling a radio telephone to an external antenna
6177908, Apr 28 1998 MURATA MANUFACTURING CO , LTD Surface-mounting type antenna, antenna device, and communication device including the antenna device
6185434, Sep 11 1996 Filtronic LK Oy Antenna filtering arrangement for a dual mode radio communication device
6190942, Oct 09 1996 PAV Card GmbH; Siemens AG; EVC Rigid Film GmbH Method and connection arrangement for producing a smart card
6195049, Sep 11 1998 Samsung Electronics Co., Ltd. Micro-strip patch antenna for transceiver
6204826, Jul 22 1999 HIGHBRIDGE PRINCIPAL STRATEGIES, LLC, AS COLLATERAL AGENT Flat dual frequency band antennas for wireless communicators
6215376, May 08 1998 Filtronic Comtek OY Filter construction and oscillator for frequencies of several gigahertz
6246368, Apr 08 1996 CENTURION WIRELESS TECHNOLOGIES, INC Microstrip wide band antenna and radome
6252552, Jan 05 1999 PULSE FINLAND OY Planar dual-frequency antenna and radio apparatus employing a planar antenna
6252554, Jun 14 1999 LK Products Oy Antenna structure
6255994, Sep 30 1998 TAIWAN SEMICONDUCTOR MANUFACTURING CO , LTD Inverted-F antenna and radio communication system equipped therewith
6259029, Mar 27 1998 Hubbell Limited Cable gland
6268831, Apr 04 2000 Ericsson Inc. Inverted-f antennas with multiple planar radiating elements and wireless communicators incorporating same
6297776, May 10 1999 Nokia Technologies Oy Antenna construction including a ground plane and radiator
6304220, Aug 05 1999 Alcatel Antenna with stacked resonant structures and a multi-frequency radiocommunications system including it
6308720, Apr 08 1998 Lockheed Martin Corporation Method for precision-cleaning propellant tanks
6316975, May 13 1996 Round Rock Research, LLC Radio frequency data communications device
6323811, Sep 30 1999 Murata Manufacturing Co., Ltd. Surface-mount antenna and communication device with surface-mount antenna
6326921, Mar 14 2000 TELEFONAKTIEBOLAGET LM ERICSSON PUBL Low profile built-in multi-band antenna
6337663, Jan 02 2001 Auden Techno Corp Built-in dual frequency antenna
6340954, Dec 16 1997 PULSE FINLAND OY Dual-frequency helix antenna
6342859, Apr 20 1998 Laird Technologies AB Ground extension arrangement for coupling to ground means in an antenna system, and an antenna system and a mobile radio device having such ground arrangement
6346914, Aug 25 1999 PULSE FINLAND OY Planar antenna structure
6348892, Oct 20 1999 PULSE FINLAND OY Internal antenna for an apparatus
6353443, Jul 09 1998 Telefonaktiebolaget LM Ericsson Miniature printed spiral antenna for mobile terminals
6366243, Oct 30 1998 PULSE FINLAND OY Planar antenna with two resonating frequencies
6377827, Sep 25 1998 Ericsson Inc. Mobile telephone having a folding antenna
6380905, Sep 10 1999 Cantor Fitzgerald Securities Planar antenna structure
6396444, Dec 23 1998 VIVO MOBILE COMMUNICATION CO , LTD Antenna and method of production
6404394, Dec 23 1999 Tyco Electronics Logistics AG Dual polarization slot antenna assembly
6417813, Oct 31 2000 NORTH SOUTH HOLDINGS INC Feedthrough lens antenna and associated methods
6423915, Jul 26 2001 MARCONI INTELLECTUAL PROPERTY RINGFENCE INC Switch contact for a planar inverted F antenna
6429818, Jan 16 1998 Tyco Electronics Logistics AG Single or dual band parasitic antenna assembly
6452551, Aug 02 2001 Auden Techno Corp. Capacitor-loaded type single-pole planar antenna
6452558, Aug 23 2000 Matsushita Electric Industrial Co., Ltd. Antenna apparatus and a portable wireless communication apparatus
6456249, Sep 16 1999 Tyco Electronics Logistics A.G. Single or dual band parasitic antenna assembly
6459413, Jan 10 2001 Industrial Technology Research Institute Multi-frequency band antenna
6462716, Aug 24 2000 Murata Manufacturing Co., Ltd. Antenna device and radio equipment having the same
6469673, Jun 30 2000 Nokia Technologies Oy Antenna circuit arrangement and testing method
6473056, Jun 12 2000 PULSE FINLAND OY Multiband antenna
6476769, Sep 19 2001 Nokia Technologies Oy Internal multi-band antenna
6480155, Dec 28 1999 Nokia Technologies Oy Antenna assembly, and associated method, having an active antenna element and counter antenna element
6501425, Sep 09 1999 Murrata Manufacturing Co., Ltd. Surface-mounted type antenna and communication device including the same
6518925, Jul 08 1999 PULSE FINLAND OY Multifrequency antenna
6529168, Oct 27 2000 Cantor Fitzgerald Securities Double-action antenna
6535170, Dec 11 2000 Sony Corporation Dual band built-in antenna device and mobile wireless terminal equipped therewith
6538604, Nov 01 1999 PULSE FINLAND OY Planar antenna
6549167, Sep 25 2001 Samsung Electro-Mechanics Co., Ltd. Patch antenna for generating circular polarization
6556812, Nov 04 1998 Nokia Mobile Phones Limited Antenna coupler and arrangement for coupling a radio telecommunication device to external apparatuses
6566944, Feb 21 2002 Ericsson Inc Current modulator with dynamic amplifier impedance compensation
6580396, May 25 2001 Chi Mei Communication Systems, Inc. Dual-band antenna with three resonators
6580397, Oct 27 2000 TELEFONAKTIEBOLAGET LM ERICSSON PUBL Arrangement for a mobile terminal
6600449, Apr 10 2001 Murata Manufacturing Co., Ltd. Antenna apparatus
6603430, Mar 09 2000 RANGESTAR WIRELESS, INC Handheld wireless communication devices with antenna having parasitic element
6606016, Mar 10 2000 Murata Manufacturing Co., Ltd. Surface acoustic wave device using two parallel connected filters with different passbands
6611235, Mar 07 2001 Smarteq Wireless AB Antenna coupling device
6614400, Aug 07 2000 Telefonaktiebolaget LM Ericsson (publ) Antenna
6614405, Nov 25 1997 PULSE FINLAND OY Frame structure
6634564, Oct 24 2000 DAI NIPPON PRINTING CO , LTD Contact/noncontact type data carrier module
6636181, Dec 26 2000 Lenovo PC International Transmitter, computer system, and opening/closing structure
6639564, Feb 13 2002 AERIUS INTERNATIONAL, LTD Device and method of use for reducing hearing aid RF interference
6646606, Oct 18 2000 PULSE FINLAND OY Double-action antenna
6650295, Jan 28 2002 RPX Corporation Tunable antenna for wireless communication terminals
6657593, Jun 20 2001 Murata Manufacturing Co., Ltd. Surface mount type antenna and radio transmitter and receiver using the same
6657595, May 09 2002 Google Technology Holdings LLC Sensor-driven adaptive counterpoise antenna system
6670926, Oct 31 2001 Kabushiki Kaisha Toshiba Wireless communication device and information-processing apparatus which can hold the device
6677903, Dec 04 2000 ARIMA OPTOELECTRONICS CORP Mobile communication device having multiple frequency band antenna
6683573, Apr 16 2002 Samsung Electro-Mechanics Co., Ltd. Multi band chip antenna with dual feeding ports, and mobile communication apparatus using the same
6693594, Apr 02 2001 Nokia Technologies Oy Optimal use of an electrically tunable multiband planar antenna
6717551, Nov 12 2002 KYOCERA AVX COMPONENTS SAN DIEGO , INC Low-profile, multi-frequency, multi-band, magnetic dipole antenna
6727857, May 17 2001 LK Products Oy Multiband antenna
6734825, Oct 28 2002 SUNTRUST BANK, AS ADMINISTRATIVE AGENT Miniature built-in multiple frequency band antenna
6734826, Nov 08 2002 Hon Hai Precisionind. Co., Ltd. Multi-band antenna
6738022, Apr 18 2001 PULSE FINLAND OY Method for tuning an antenna and an antenna
6741214, Nov 06 2002 LAIRDTECHNOLOGEIS, INC Planar Inverted-F-Antenna (PIFA) having a slotted radiating element providing global cellular and GPS-bluetooth frequency response
6753813, Jul 25 2001 Murata Manufacturing Co., Ltd. Surface mount antenna, method of manufacturing the surface mount antenna, and radio communication apparatus equipped with the surface mount antenna
6759989, Oct 22 2001 PULSE FINLAND OY Internal multiband antenna
6765536, May 09 2002 Google Technology Holdings LLC Antenna with variably tuned parasitic element
6774853, Nov 07 2002 Accton Technology Corporation Dual-band planar monopole antenna with a U-shaped slot
6781545, May 31 2002 Samsung Electro-Mechanics Co., Ltd. Broadband chip antenna
6801166, Feb 01 2002 Cantor Fitzgerald Securities Planar antenna
6801169, Mar 14 2003 Hon Hai Precision Ind. Co., Ltd. Multi-band printed monopole antenna
6806835, Oct 24 2001 Panasonic Intellectual Property Corporation of America Antenna structure, method of using antenna structure and communication device
6819287, Mar 15 2001 LAIRDTECHNOLOGEIS, INC Planar inverted-F antenna including a matching network having transmission line stubs and capacitor/inductor tank circuits
6819293, Feb 13 2002 BREAKWATERS INNOVATIONS LLC Patch antenna with switchable reactive components for multiple frequency use in mobile communications
6825818, Apr 11 2001 Kyocera Corporation Tunable matching circuit
6836249, Oct 22 2002 Google Technology Holdings LLC Reconfigurable antenna for multiband operation
6847329, Jul 09 2002 Hitachi Cable, Ltd. Plate-like multiple antenna and electrical equipment provided therewith
6856293, Mar 15 2001 PULSE FINLAND OY Adjustable antenna
6862437, Jun 03 1999 Macom Technology Solutions Holdings, Inc Dual band tuning
6862441, Jun 09 2003 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LIMITED Transmitter filter arrangement for multiband mobile phone
6873291, Jun 15 2001 Hitachi Metals, Ltd Surface-mounted antenna and communications apparatus comprising same
6876329, Aug 30 2002 Cantor Fitzgerald Securities Adjustable planar antenna
6882317, Nov 27 2001 PULSE FINLAND OY Dual antenna and radio device
6891507, Nov 13 2002 Murata Manufacturing Co., Ltd. Surface mount antenna, method of manufacturing same, and communication device
6897810, Nov 13 2002 Hon Hai Precision Ind. Co., LTD Multi-band antenna
6900768, Sep 25 2001 MATSUSHITA ELECTRIC INDUSTRIAL CO , LTD Antenna device and communication equipment using the device
6903692, Jun 01 2001 PULSE FINLAND OY Dielectric antenna
6911945, Feb 27 2003 Cantor Fitzgerald Securities Multi-band planar antenna
6922171, Feb 24 2000 Cantor Fitzgerald Securities Planar antenna structure
6925689, Jul 15 2003 Spring clip
6927792, Mar 11 1999 MATSUSHITA ELECTRIC INDUSTRIAL CO , LTD Television camera and white balance correcting method
6937196, Jan 15 2003 PULSE FINLAND OY Internal multiband antenna
6950066, Aug 22 2002 SKYCROSS CO , LTD Apparatus and method for forming a monolithic surface-mountable antenna
6950068, Nov 15 2001 PULSE FINLAND OY Method of manufacturing an internal antenna, and antenna element
6952144, Jun 16 2003 Apple Inc Apparatus and method to provide power amplification
6952187, Dec 31 2002 Cantor Fitzgerald Securities Antenna for foldable radio device
6958730, May 02 2001 Murata Manufacturing Co., Ltd. Antenna device and radio communication equipment including the same
6961544, Jul 14 1999 Cantor Fitzgerald Securities Structure of a radio-frequency front end
6963308, Jan 15 2003 PULSE FINLAND OY Multiband antenna
6963310, Sep 09 2002 Hitachi Cable, LTD Mobile phone antenna
6967618, Apr 09 2002 Cantor Fitzgerald Securities Antenna with variable directional pattern
6975278, Feb 28 2003 Hong Kong Applied Science and Technology Research Institute, Co., Ltd. Multiband branch radiator antenna element
6985108, Sep 19 2002 Cantor Fitzgerald Securities Internal antenna
6992543, Nov 22 2002 Raytheon Company Mems-tuned high power, high efficiency, wide bandwidth power amplifier
6995710, Oct 09 2001 NGK SPARK PLUG CO , LTD Dielectric antenna for high frequency wireless communication apparatus
7023341, Feb 03 2003 The ADT Security Corporation RFID reader for a security network
7031744, Dec 01 2000 COLTERA, LLC Compact cellular phone
7042403, Jan 23 2004 GM Global Technology Operations LLC Dual band, low profile omnidirectional antenna
7053841, Jul 31 2003 QUARTERHILL INC ; WI-LAN INC Parasitic element and PIFA antenna structure
7054671, Sep 27 2000 Nokia Technologies Oy Antenna arrangement in a mobile station
7057560, May 07 2003 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LIMITED Dual-band antenna for a wireless local area network device
7081857, Dec 02 2002 PULSE FINLAND OY Arrangement for connecting additional antenna to radio device
7084831, Feb 26 2004 Matsushita Electric Industrial Co., Ltd. Wireless device having antenna
7099690, Apr 15 2003 Cantor Fitzgerald Securities Adjustable multi-band antenna
7113133, Dec 31 2004 Advanced Connectek Inc. Dual-band inverted-F antenna with a branch line shorting strip
7119749, Apr 28 2004 Murata Manufacturing Co., Ltd. Antenna and radio communication apparatus
7126546, Jun 29 2001 PULSE FINLAND OY Arrangement for integrating a radio phone structure
7136019, Dec 16 2002 PULSE FINLAND OY Antenna for flat radio device
7136020, Nov 12 2003 Murata Manufacturing Co., Ltd. Antenna structure and communication device using the same
7142824, Oct 07 2002 MATSUSHITA ELECTRIC INDUSTRIAL CO , LTD Antenna device with a first and second antenna
7148847, Sep 01 2003 ALPS Electric Co., Ltd. Small-size, low-height antenna device capable of easily ensuring predetermined bandwidth
7148849, Dec 23 2003 Quanta Computer, Inc. Multi-band antenna
7148851, Aug 08 2003 Hitachi Metals, Ltd Antenna device and communications apparatus comprising same
7170464, Sep 21 2004 Industrial Technology Research Institute Integrated mobile communication antenna
7176838, Aug 22 2005 Google Technology Holdings LLC Multi-band antenna
7180455, Oct 13 2004 Samsung Electro-Mechanics Co., Ltd. Broadband internal antenna
7193574, Oct 18 2004 InterDigital Technology Corporation Antenna for controlling a beam direction both in azimuth and elevation
7205942, Jul 06 2005 Nokia Technologies Oy Multi-band antenna arrangement
7218280, Apr 26 2004 PULSE FINLAND OY Antenna element and a method for manufacturing the same
7218282, Apr 28 2003 Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E V Antenna device
7224313, May 09 2003 OAE TECHNOLOGY INC Multiband antenna with parasitically-coupled resonators
7230574, Feb 13 2002 AERIUS INTERNATIONAL, LTD Oriented PIFA-type device and method of use for reducing RF interference
7237318, Mar 31 2003 Cantor Fitzgerald Securities Method for producing antenna components
7256743, Oct 20 2003 PULSE FINLAND OY Internal multiband antenna
7274334, Mar 24 2005 TDK Corporation; TDK Kabushiki Kaisha Stacked multi-resonator antenna
7283097, Nov 26 2003 Malikie Innovations Limited Multi-band antenna with patch and slot structures
7289064, Aug 23 2005 Apple Inc Compact multi-band, multi-port antenna
7292200, Sep 23 2004 Mobile Mark, Inc. Parasitically coupled folded dipole multi-band antenna
7319432, Mar 14 2002 Sony Ericsson Mobile Communications AB Multiband planar built-in radio antenna with inverted-L main and parasitic radiators
7330153, Apr 10 2006 Deere & Company Multi-band inverted-L antenna
7333067, May 24 2004 Hon Hai Precision Ind. Co., Ltd. Multi-band antenna with wide bandwidth
7339528, Dec 24 2003 RPX Corporation Antenna for mobile communication terminals
7340286, Oct 09 2003 PULSE FINLAND OY Cover structure for a radio device
7345634, Aug 20 2004 Kyocera Corporation Planar inverted “F” antenna and method of tuning same
7352326, Oct 31 2003 Cantor Fitzgerald Securities Multiband planar antenna
7358902, May 07 2003 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LIMITED Dual-band antenna for a wireless local area network device
7382319, Dec 02 2003 MURATA MANUFACTURING CO , LTD Antenna structure and communication apparatus including the same
7385556, Dec 22 2006 CLOUD NETWORK TECHNOLOGY SINGAPORE PTE LTD Planar antenna
7388543, Nov 15 2005 SNAPTRACK, INC Multi-frequency band antenna device for radio communication terminal having wide high-band bandwidth
7391378, Jan 15 2003 PULSE FINLAND OY Antenna element for a radio device
7405702, Jul 24 2003 Cantor Fitzgerald Securities Antenna arrangement for connecting an external device to a radio device
7417588, Jan 30 2004 FRACTUS S A Multi-band monopole antennas for mobile network communications devices
7423592, Dec 22 2002 FRACTUS, S A Multi-band monopole antennas for mobile communications devices
7432860, May 17 2006 Sony Corporation Multi-band antenna for GSM, UMTS, and WiFi applications
7439929, Dec 09 2005 Sony Ericsson Mobile Communications AB Tuning antennas with finite ground plane
7468700, Dec 15 2003 PULSE FINLAND OY Adjustable multi-band antenna
7468709, Sep 11 2003 PULSE FINLAND OY Method for mounting a radiator in a radio device and a radio device
7498990, Jul 15 2005 Samsung Electro-Mechanics Co., Ltd. Internal antenna having perpendicular arrangement
7501983, Jan 15 2003 Cantor Fitzgerald Securities Planar antenna structure and radio device
7502598, May 28 2004 Intel Corporation Transmitting arrangement, receiving arrangement, transceiver and method for operation of a transmitting arrangement
7589678, Oct 05 2006 PULSE FINLAND OY Multi-band antenna with a common resonant feed structure and methods
7616158, May 26 2006 HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE CO , LTD Multi mode antenna system
7633449, Feb 29 2008 Google Technology Holdings LLC Wireless handset with improved hearing aid compatibility
7663551, Nov 24 2005 PULSE FINLAND OY Multiband antenna apparatus and methods
7679565, Jun 28 2004 PULSE FINLAND OY Chip antenna apparatus and methods
7692543, Nov 02 2004 SENSORMATIC ELECTRONICS, LLC Antenna for a combination EAS/RFID tag with a detacher
7710325, Aug 15 2006 Apple Inc Multi-band dielectric resonator antenna
7724204, Oct 02 2006 PULSE ELECTRONICS, INC Connector antenna apparatus and methods
7760146, Mar 24 2005 RPX Corporation Internal digital TV antennas for hand-held telecommunications device
7764245, Jun 16 2006 AT&T MOBILITY II LLC Multi-band antenna
7786938, Jun 28 2004 PULSE FINLAND OY Antenna, component and methods
7800544, Nov 12 2003 SAMSUNG ELECTRONICS CO , LTD Controllable multi-band antenna device and portable radio communication device comprising such an antenna device
7830327, May 18 2007 Intel Corporation Low cost antenna design for wireless communications
7889139, Jun 21 2007 Apple Inc.; Apple Inc Handheld electronic device with cable grounding
7889143, Sep 20 2006 Cantor Fitzgerald Securities Multiband antenna system and methods
7901617, May 18 2004 ENPOT HOLDINGS LIMITED Heat exchanger
7916086, Nov 11 2004 Cantor Fitzgerald Securities Antenna component and methods
7963347, Oct 16 2007 Schlumberger Technology Corporation Systems and methods for reducing backward whirling while drilling
7973720, Jun 28 2004 Cantor Fitzgerald Securities Chip antenna apparatus and methods
8049670, Mar 25 2008 LG Electronics Inc. Portable terminal
8179322, Sep 28 2007 PULSE FINLAND OY Dual antenna apparatus and methods
20010050636,
20020183013,
20020196192,
20030146873,
20040090378,
20040145525,
20040171403,
20050057401,
20050159131,
20050176481,
20060071857,
20070042615,
20070082789,
20070152881,
20080055164,
20080059106,
20080088511,
20080266199,
20090009415,
20090135066,
20090174604,
20090196160,
20100220016,
20100244978,
20100309092,
20110102290,
20110133994,
20120119955,
CN1316797,
DE10015583,
DE10104862,
DE10150149,
EP208424,
EP278069,
EP279050,
EP332139,
EP339822,
EP376643,
EP383292,
EP399975,
EP400872,
EP401839,
EP447218,
EP615285,
EP621653,
EP637094,
EP749214,
EP751043,
EP759646,
EP766339,
EP766340,
EP766341,
EP807988,
EP831547,
EP851530,
EP856907,
EP892459,
EP923158,
EP942488,
EP993070,
EP999807,
EP1003240,
EP1006605,
EP1006606,
EP1014487,
EP1024553,
EP1026774,
EP1052722,
EP1052723,
EP1063722,
EP1067627,
EP1094545,
EP1098387,
EP1102348,
EP1113524,
EP1128466,
EP1139490,
EP1146589,
EP1162688,
EP1170822,
EP1220456,
EP1248316,
EP1267441,
EP1271690,
EP1294048,
EP1294049,
EP1306922,
EP1329980,
EP1351334,
EP1361623,
EP1396906,
EP1406345,
EP1414108,
EP1432072,
EP1437793,
EP1439603,
EP1445822,
EP1453137,
EP1467456,
EP1469549,
EP1482592,
EP1498984,
EP1544943,
EP1564839,
EP1753079,
EP1791213,
EP1843432,
FI20020829,
FR2553584,
FR2873247,
GB2266997,
GB2360422,
GB239246,
JP10028013,
JP10107671,
JP10173423,
JP10209733,
JP10224142,
JP10322124,
JP10327011,
JP11004117,
JP11068456,
JP11127010,
JP11127014,
JP11136025,
JP11355033,
JP114113,
JP2000278028,
JP2001217631,
JP2001267833,
JP2001326513,
JP200153543,
JP2002319811,
JP2002329541,
JP2002335117,
JP2003124730,
JP2003179426,
JP2003318638,
JP200360417,
JP2004112028,
JP2004363859,
JP2005005985,
JP2005252661,
JP59202831,
JP600206304,
JP61245704,
JP6152463,
JP7131234,
JP7221536,
JP7249923,
JP7307612,
JP8216571,
JP9083242,
JP9260934,
JP9307344,
KR1020067027462,
KR20010080521,
KR20020096016,
RE34898, Jun 09 1989 Cantor Fitzgerald Securities Ceramic band-pass filter
SE511900,
WO2004100313,
WO36700,
WO120718,
WO124316,
WO128035,
WO129927,
WO133665,
WO161781,
WO191236,
WO2067375,
WO2078123,
WO2078124,
WO208672,
WO211236,
WO213307,
WO241443,
WO3094290,
WO2004017462,
WO2004036778,
WO2004057697,
WO2004070872,
WO2004112189,
WO2005011055,
WO2005018045,
WO2005034286,
WO2005038981,
WO2005055364,
WO2005062416,
WO2006000631,
WO2006000650,
WO2006051160,
WO2006084951,
WO2006097567,
WO2007000483,
WO2007012697,
WO2007039667,
WO2007039668,
WO2007042614,
WO2007042615,
WO2007050600,
WO2007080214,
WO2007098810,
WO2007138157,
WO2008059106,
WO2008129125,
WO2009027579,
WO2009095531,
WO2009106682,
WO9200635,
WO9627219,
WO9801919,
WO9801921,
WO9837592,
WO9930479,
/////
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